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To be usable, a sample must contain the characteristics of the population, making it:
AFully exhaustive
BSystematic only
CStratified only
DRepresentative
Answer & Solution
Correct answer: D. Representative
1. A sample stands in for a population that is too large to measure.
2. It can only do that if it resembles the population in the ways that matter.
3. The sample must contain the characteristics of the population in order to be a representative sample.
4. Stratified and systematic name particular ways of drawing a sample, not the property required of it.
_Source: OpenStax Introductory Statistics 2e (CC BY 4.0), Ch 1 'Sampling and Data', sections 1.1-1.4_
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